I have a surgeing problem. when driving and the truck and it starts lugging down I give it little gas and the turbo starts to spool and dumps on and off till i really give it throttle. only on light turbo boost and when the truck is lugging down. I think if the truck would just shift down a gear and not try to lugg way down this wouldnt be a problem. the truck also dumps boost under acceleration when shifting from 3rd to 4th gear sometimes. does anyone else have this problem and if so what need to be done to fix it. thx